1. Tardigrade
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  3. Physics
  4. A uniform copper rod of length 50 cm and diameter 3.0 mm is kept on a frictionless horizontal surface at 20° C. The coefficient of linear expansion of copper is 2.0 × 10-5 K -1 and Young's modulus is 1.2 × 1011 N / m 2. The copper rod is heated to 100° C, then the tension developed in the copper rod is

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Q. A uniform copper rod of length $50\, cm$ and diameter $3.0 \, mm$ is kept on a frictionless horizontal surface at $20^{\circ} \, C$. The coefficient of linear expansion of copper is $2.0 \times 10^{-5} \, K ^{-1}$ and Young's modulus is $1.2 \times 10^{11} \, N / m ^{2}$. The copper rod is heated to $100^{\circ} \, C$, then the tension developed in the copper rod is

Thermal Properties of Matter

Solution:

Since the rod is not bounded, No compressive stress
hence no tensions